8. Correct. The answer is true.

 

m=15, n=10, s12=24 and s22=16, so that

(estimated s12)=s12*m/(m-1) = 24*15/14=25.71

(estimated s22)=s22*n/(n-1) = 16*10/9=17.78

 

From the F-table, for n1=14 and n2=9 F0.95=3.01 and F0.05=1/2.59. Thus the 90% confidence interval is